LABORATORY MANUAL OF HORTICULTURE 



c. Make a drawing of a longitudinal and a cross section of a 

 branch bud and a fruit bud. Describe the internal differences. 

 Make a dozen or more sections of the flower buds and count 

 the ovules in each. Is the number constant ? Can you give any 

 reason for variation ? Is there any ratio between the number 

 of ovules in the buds and the number of clusters in the group ? 

 Do you find the buds arranged singly, or in groups on short 

 spurs? Where do you find the greatest number of buds, and 

 how old is the wood on which they are borne ? Describe the rela- 

 tive position of the branch bud and the fruit bud. 



2. Morello group. The morellos, or sour cherries (Prunus 

 cerasus), include the following varieties : Early Richmond, May 

 Duke, Montmorency, Morello, Royal Duke, Wragg, and several 

 more. 



a. Secure branches from one or two of the above-named vari- 

 eties, or from any other of the sour cherries, and. study carefully. 

 Make a drawing of a branch, natural size, and at least four inches 

 in length. Describe the differences between the branches of the 

 sweet and the sour cherry. 



b. Make a drawing, at least one inch in length, of a fruit 

 bud and a branch bud. How do these buds differ from those 

 of the sweet cherry ? Are the buds arranged singly or in clus- 

 ters ? Do you find spurs on the sour cherries ? Describe fully. 

 Now cut cross sections of several fruit buds. How many ovules 

 do you find? Is the number constant, and does it differ from 

 the number in the sweet cherry ? 



c. Describe fully the differences between the buds of the 

 sweet cherry and those of the sour cherry. Describe the general 

 appearance of a branch of each. Which branch gives the impres- 

 sion of a rigid, stiff, and upright growth ? Describe the difference 

 in the bark of the two cherries. 



[58] 



